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| Criterion |  Decision Making Assumption Surfacing |  Decision Making Delphi Method |  Operations 5 Whys |  Operations 8D Problem Solving |
|---|---|---|---|---|
Purposedifferent | Plans often contain assumptions that were never openly stated and remain dangerous precisely because of that. Assumption Surfacing makes these silent premises visible and prioritizes which of them carry the initiative or could sink it. | When knowledge is distributed and direct dominance should be avoided, groups quickly fall under the sway of their opinion leaders. The Delphi Method gathers assessments iteratively and gradually brings expert judgments closer together. | For a single, hard-to-explain deviation, the method exposes the causal chain behind the visible symptom. It keeps the cause open until a controllable condition emerges instead of a mere description. | For an acute quality or delivery problem, the method structures immediate protection and root cause work together. It keeps the situation stable while the actual cause is investigated cleanly. |
Complexitydifferent | Low | High | Low | High |
Timedifferent | 45-90 min | 1-4 Wochen | 15-30 min | 1-6 Wochen |
Participantsdifferent | 2-8 | 6-30 Experten | 2-6 | 4-10 |
Formatdifferent | Workshop + async | Async | Workshop | Workshop + async |
Outputdifferent | Assumption List, Critical Assumptions, Learning Plan | Expert Forecast, Consensus Range, Assumption Notes | Root cause notes, Countermeasures | 8D Report, Containment Plan, Root Cause Evidence, Corrective Action Plan |
Tagsno overlap | AssumptionsRiskDecisionDiscovery | ForecastingExpertsDecisionStrategy | Root causeIncidentLeanProblem solving | QualityProblem solvingRoot cause |